head to head · open source
KeePassDX vs fido2-net-lib
KeePassDX has 7,340 GitHub stars, 403 forks, 541 open issues and last shipped 5 days ago. fido2-net-lib has 1,452 stars, 202 forks, 20 open issues and last shipped 2 days ago. KeePassDX leads on adoption by 406% (7,340 vs 1,452 stars). KeePassDX is written in Kotlin under GPL-3.0; fido2-net-lib is written in C# under MIT. KeePassDX has attracted 5% as many forks as stars, fido2-net-lib 14%. fido2-net-lib was the more recently maintained of the two, and both are self-hostable with no licence fee. The two share 1 topic tag (passkeys), so they are genuine substitutes rather than adjacent tools.
Two open source projects, one decision. Both are free and self-hostable — the differences are community size, license terms, language stack and release pace.
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Side by side
| KeePassDX | fido2-net-lib | |
|---|---|---|
| GitHub stars | ★ 7.3K | ★ 1.5K |
| License | GPL-3.0 | MIT |
| Written in | Kotlin | C# |
| Last push | 2026-09-15 | 2026-09-18 |
| Forks | ⑂ 403 | ⑂ 202 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick KeePassDX if
- You weight community size — 7.3K stars and counting
- You want the GPL-3.0 license terms
- Your stack matches Kotlin
- You value the larger contributor base for long-term maintenance
pick fido2-net-lib if
- You want the fido2-net-lib feature set and don't need the biggest community
- You prefer the MIT license terms
- Your stack matches C#
- You evaluated both and fido2-net-lib fits your workflow better
About KeePassDX
KeePassDX is a free, open source and ad free password and passkey manager for Android that keeps credentials in a single encrypted local database file in KeePass format and fills login forms through autofill and its own keyboard.
read the full KeePassDX overview →
About fido2-net-lib
fido2 net lib is an open source, MIT licensed C library that provides a FIDO2 server and WebAuthn relying party implementation for .NET, aimed at developers who want passkey registration and sign in in ASP.NET Core, .NET Core and native .NET applications without writing the credential validation logic themselves.
read the full fido2-net-lib overview →
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Frequently asked questions
Is KeePassDX or fido2-net-lib more popular?
KeePassDX has 7,340 GitHub stars and fido2-net-lib has 1,452. KeePassDX has the larger community by that measure.
Are KeePassDX and fido2-net-lib free?
Both are open source. KeePassDX is licensed under GPL-3.0 and fido2-net-lib under MIT. Neither carries a licence fee.
What is the difference between KeePassDX and fido2-net-lib?
KeePassDX is written in Kotlin and fido2-net-lib in C#. The practical differences are community size, licence terms, language stack and release cadence — all compared in the table above.
Which should I choose, KeePassDX or fido2-net-lib?
Choose KeePassDX if you want the larger community (7,340 stars) or its GPL-3.0 licence terms. Choose fido2-net-lib if its feature set, stack or MIT licence fits better. Both are self-hostable.